Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
van cac » van hac, van cau, van bac
van hau » van ha, van hai, van dau
va danh » va dan, va hanh, dia danh
va dinh » van dinh, va kinh, va tinh
cuc te » cua te, cuc thue, cuc tieu
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang x hoi. thien ((van cac) or (van hau)) nuoc ((va danh) OR (va dinh)) tai cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. thien ((van cac) OR (van hau)) nuoc ((va danh) OR (va dinh)) tai cuc te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang x hoi. thien ((van cac) or (van hau)) nuoc ((va danh) OR (va dinh)) tai cuc te".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. thien ((van cac) or (van hau)) nuoc ((va danh) OR (va dinh)) tai cuc te*.